/*********************************************************************** A JavaScript tokenizer / parser / beautifier / compressor. https://github.com/mishoo/UglifyJS2 -------------------------------- (C) --------------------------------- Author: Mihai Bazon http://mihai.bazon.net/blog Distributed under the BSD license: Copyright 2012 (c) Mihai Bazon Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***********************************************************************/ "use strict"; var EXPECT_DIRECTIVE = /^$|[;{][\s\n]*$/; function is_some_comments(comment) { // multiline comment return comment.type == "comment2" && /@preserve|@license|@cc_on/i.test(comment.value); } function OutputStream(options) { var readonly = !options; options = defaults(options, { ascii_only : false, beautify : false, braces : false, comments : false, ie8 : false, indent_level : 4, indent_start : 0, inline_script : true, keep_quoted_props: false, max_line_len : false, preamble : null, preserve_line : false, quote_keys : false, quote_style : 0, semicolons : true, shebang : true, source_map : null, webkit : false, width : 80, wrap_iife : false, }, true); // Convert comment option to RegExp if neccessary and set up comments filter var comment_filter = return_false; // Default case, throw all comments away if (options.comments) { var comments = options.comments; if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) { var regex_pos = options.comments.lastIndexOf("/"); comments = new RegExp( options.comments.substr(1, regex_pos - 1), options.comments.substr(regex_pos + 1) ); } if (comments instanceof RegExp) { comment_filter = function(comment) { return comment.type != "comment5" && comments.test(comment.value); }; } else if (typeof comments === "function") { comment_filter = function(comment) { return comment.type != "comment5" && comments(this, comment); }; } else if (comments === "some") { comment_filter = is_some_comments; } else { // NOTE includes "all" option comment_filter = return_true; } } var indentation = 0; var current_col = 0; var current_line = 1; var current_pos = 0; var OUTPUT = ""; var to_utf8 = options.ascii_only ? function(str, identifier) { return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) { var code = ch.charCodeAt(0).toString(16); if (code.length <= 2 && !identifier) { while (code.length < 2) code = "0" + code; return "\\x" + code; } else { while (code.length < 4) code = "0" + code; return "\\u" + code; } }); } : function(str) { var s = ""; for (var i = 0, len = str.length; i < len; i++) { if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1]) || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) { s += "\\u" + str.charCodeAt(i).toString(16); } else { s += str[i]; } } return s; }; function make_string(str, quote) { var dq = 0, sq = 0; str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g, function(s, i){ switch (s) { case '"': ++dq; return '"'; case "'": ++sq; return "'"; case "\\": return "\\\\"; case "\n": return "\\n"; case "\r": return "\\r"; case "\t": return "\\t"; case "\b": return "\\b"; case "\f": return "\\f"; case "\x0B": return options.ie8 ? "\\x0B" : "\\v"; case "\u2028": return "\\u2028"; case "\u2029": return "\\u2029"; case "\ufeff": return "\\ufeff"; case "\0": return /[0-9]/.test(str.charAt(i+1)) ? "\\x00" : "\\0"; } return s; }); function quote_single() { return "'" + str.replace(/\x27/g, "\\'") + "'"; } function quote_double() { return '"' + str.replace(/\x22/g, '\\"') + '"'; } str = to_utf8(str); switch (options.quote_style) { case 1: return quote_single(); case 2: return quote_double(); case 3: return quote == "'" ? quote_single() : quote_double(); default: return dq > sq ? quote_single() : quote_double(); } } function encode_string(str, quote) { var ret = make_string(str, quote); if (options.inline_script) { ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2"); ret = ret.replace(/\x3c!--/g, "\\x3c!--"); ret = ret.replace(/--\x3e/g, "--\\x3e"); } return ret; } function make_name(name) { name = name.toString(); name = to_utf8(name, true); return name; } function make_indent(back) { return repeat_string(" ", options.indent_start + indentation - back * options.indent_level); } /* -----[ beautification/minification ]----- */ var has_parens = false; var might_need_space = false; var might_need_semicolon = false; var might_add_newline = 0; var need_newline_indented = false; var need_space = false; var newline_insert = -1; var last = ""; var mapping_token, mapping_name, mappings = options.source_map && []; var do_add_mapping = mappings ? function() { mappings.forEach(function(mapping) { try { options.source_map.add( mapping.token.file, mapping.line, mapping.col, mapping.token.line, mapping.token.col, !mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name ); } catch(ex) { AST_Node.warn("Couldn't figure out mapping for {file}:{line},{col} → {cline},{ccol} [{name}]", { file: mapping.token.file, line: mapping.token.line, col: mapping.token.col, cline: mapping.line, ccol: mapping.col, name: mapping.name || "" }) } }); mappings = []; } : noop; var ensure_line_len = options.max_line_len ? function() { if (current_col > options.max_line_len) { if (might_add_newline) { var left = OUTPUT.slice(0, might_add_newline); var right = OUTPUT.slice(might_add_newline); if (mappings) { var delta = right.length - current_col; mappings.forEach(function(mapping) { mapping.line++; mapping.col += delta; }); } OUTPUT = left + "\n" + right; current_line++; current_pos++; current_col = right.length; } if (current_col > options.max_line_len) { AST_Node.warn("Output exceeds {max_line_len} characters", options); } } if (might_add_newline) { might_add_newline = 0; do_add_mapping(); } } : noop; var requireSemicolonChars = makePredicate("( [ + * / - , ."); function print(str) { str = String(str); var ch = str.charAt(0); if (need_newline_indented && ch) { need_newline_indented = false; if (ch != "\n") { print("\n"); indent(); } } if (need_space && ch) { need_space = false; if (!/[\s;})]/.test(ch)) { space(); } } newline_insert = -1; var prev = last.charAt(last.length - 1); if (might_need_semicolon) { might_need_semicolon = false; if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") { if (options.semicolons || requireSemicolonChars[ch]) { OUTPUT += ";"; current_col++; current_pos++; } else { ensure_line_len(); OUTPUT += "\n"; current_pos++; current_line++; current_col = 0; if (/^\s+$/.test(str)) { // reset the semicolon flag, since we didn't print one // now and might still have to later might_need_semicolon = true; } } if (!options.beautify) might_need_space = false; } } if (!options.beautify && options.preserve_line && stack[stack.length - 1]) { var target_line = stack[stack.length - 1].start.line; while (current_line < target_line) { ensure_line_len(); OUTPUT += "\n"; current_pos++; current_line++; current_col = 0; might_need_space = false; } } if (might_need_space) { if ((is_identifier_char(prev) && (is_identifier_char(ch) || ch == "\\")) || (ch == "/" && ch == prev) || ((ch == "+" || ch == "-") && ch == last)) { OUTPUT += " "; current_col++; current_pos++; } might_need_space = false; } if (mapping_token) { mappings.push({ token: mapping_token, name: mapping_name, line: current_line, col: current_col }); mapping_token = false; if (!might_add_newline) do_add_mapping(); } OUTPUT += str; has_parens = str[str.length - 1] == "("; current_pos += str.length; var a = str.split(/\r?\n/), n = a.length - 1; current_line += n; current_col += a[0].length; if (n > 0) { ensure_line_len(); current_col = a[n].length; } last = str; } var space = options.beautify ? function() { print(" "); } : function() { might_need_space = true; }; var indent = options.beautify ? function(half) { if (options.beautify) { print(make_indent(half ? 0.5 : 0)); } } : noop; var with_indent = options.beautify ? function(col, cont) { if (col === true) col = next_indent(); var save_indentation = indentation; indentation = col; var ret = cont(); indentation = save_indentation; return ret; } : function(col, cont) { return cont() }; var may_add_newline = options.max_line_len ? function() { ensure_line_len(); might_add_newline = OUTPUT.length; } : noop; var newline = options.beautify ? function() { if (newline_insert < 0) return print("\n"); if (OUTPUT[newline_insert] != "\n") { OUTPUT = OUTPUT.slice(0, newline_insert) + "\n" + OUTPUT.slice(newline_insert); current_pos++; current_line++; } newline_insert++; } : may_add_newline; var semicolon = options.beautify ? function() { print(";"); } : function() { might_need_semicolon = true; }; function force_semicolon() { might_need_semicolon = false; print(";"); } function next_indent() { return indentation + options.indent_level; } function with_block(cont) { var ret; print("{"); newline(); with_indent(next_indent(), function(){ ret = cont(); }); indent(); print("}"); return ret; } function with_parens(cont) { print("("); may_add_newline(); //XXX: still nice to have that for argument lists //var ret = with_indent(current_col, cont); var ret = cont(); may_add_newline(); print(")"); return ret; } function with_square(cont) { print("["); may_add_newline(); //var ret = with_indent(current_col, cont); var ret = cont(); may_add_newline(); print("]"); return ret; } function comma() { may_add_newline(); print(","); may_add_newline(); space(); } function colon() { print(":"); space(); } var add_mapping = mappings ? function(token, name) { mapping_token = token; mapping_name = name; } : noop; function get() { if (might_add_newline) { ensure_line_len(); } return OUTPUT; } function has_nlb() { var index = OUTPUT.lastIndexOf("\n"); return /^ *$/.test(OUTPUT.slice(index + 1)); } function prepend_comments(node) { var self = this; var start = node.start; if (!start) return; if (start.comments_before && start.comments_before._dumped === self) return; var comments = start.comments_before; if (!comments) { comments = start.comments_before = []; } comments._dumped = self; if (node instanceof AST_Exit && node.value) { var tw = new TreeWalker(function(node) { var parent = tw.parent(); if (parent instanceof AST_Exit || parent instanceof AST_Binary && parent.left === node || parent.TYPE == "Call" && parent.expression === node || parent instanceof AST_Conditional && parent.condition === node || parent instanceof AST_Dot && parent.expression === node || parent instanceof AST_Sequence && parent.expressions[0] === node || parent instanceof AST_Sub && parent.expression === node || parent instanceof AST_UnaryPostfix) { var text = node.start.comments_before; if (text && text._dumped !== self) { text._dumped = self; comments = comments.concat(text); } } else { return true; } }); tw.push(node); node.value.walk(tw); } if (current_pos == 0) { if (comments.length > 0 && options.shebang && comments[0].type == "comment5") { print("#!" + comments.shift().value + "\n"); indent(); } var preamble = options.preamble; if (preamble) { print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n")); } } comments = comments.filter(comment_filter, node); if (comments.length == 0) return; var last_nlb = has_nlb(); comments.forEach(function(c, i) { if (!last_nlb) { if (c.nlb) { print("\n"); indent(); last_nlb = true; } else if (i > 0) { space(); } } if (/comment[134]/.test(c.type)) { print("//" + c.value.replace(/[@#]__PURE__/g, ' ') + "\n"); indent(); last_nlb = true; } else if (c.type == "comment2") { print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/"); last_nlb = false; } }); if (!last_nlb) { if (start.nlb) { print("\n"); indent(); } else { space(); } } } function append_comments(node, tail) { var self = this; var token = node.end; if (!token) return; var comments = token[tail ? "comments_before" : "comments_after"]; if (!comments || comments._dumped === self) return; if (!(node instanceof AST_Statement || all(comments, function(c) { return !/comment[134]/.test(c.type); }))) return; comments._dumped = self; var insert = OUTPUT.length; comments.filter(comment_filter, node).forEach(function(c, i) { need_space = false; if (need_newline_indented) { print("\n"); indent(); need_newline_indented = false; } else if (c.nlb && (i > 0 || !has_nlb())) { print("\n"); indent(); } else if (i > 0 || !tail) { space(); } if (/comment[134]/.test(c.type)) { print("//" + c.value.replace(/[@#]__PURE__/g, ' ')); need_newline_indented = true; } else if (c.type == "comment2") { print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/"); need_space = true; } }); if (OUTPUT.length > insert) newline_insert = insert; } var stack = []; return { get : get, toString : get, indent : indent, indentation : function() { return indentation }, current_width : function() { return current_col - indentation }, should_break : function() { return options.width && this.current_width() >= options.width }, has_parens : function() { return has_parens }, newline : newline, print : print, space : space, comma : comma, colon : colon, last : function() { return last }, semicolon : semicolon, force_semicolon : force_semicolon, to_utf8 : to_utf8, print_name : function(name) { print(make_name(name)) }, print_string : function(str, quote, escape_directive) { var encoded = encode_string(str, quote); if (escape_directive === true && encoded.indexOf("\\") === -1) { // Insert semicolons to break directive prologue if (!EXPECT_DIRECTIVE.test(OUTPUT)) { force_semicolon(); } force_semicolon(); } print(encoded); }, encode_string : encode_string, next_indent : next_indent, with_indent : with_indent, with_block : with_block, with_parens : with_parens, with_square : with_square, add_mapping : add_mapping, option : function(opt) { return options[opt] }, prepend_comments: readonly ? noop : prepend_comments, append_comments : readonly || comment_filter === return_false ? noop : append_comments, line : function() { return current_line }, col : function() { return current_col }, pos : function() { return current_pos }, push_node : function(node) { stack.push(node) }, pop_node : function() { return stack.pop() }, parent : function(n) { return stack[stack.length - 2 - (n || 0)]; } }; } /* -----[ code generators ]----- */ (function(){ /* -----[ utils ]----- */ function DEFPRINT(nodetype, generator) { nodetype.DEFMETHOD("_codegen", generator); } var in_directive = false; var active_scope = null; var use_asm = null; AST_Node.DEFMETHOD("print", function(stream, force_parens){ var self = this, generator = self._codegen; if (self instanceof AST_Scope) { active_scope = self; } else if (!use_asm && self instanceof AST_Directive && self.value == "use asm") { use_asm = active_scope; } function doit() { stream.prepend_comments(self); self.add_source_map(stream); generator(self, stream); stream.append_comments(self); } stream.push_node(self); if (force_parens || self.needs_parens(stream)) { stream.with_parens(doit); } else { doit(); } stream.pop_node(); if (self === use_asm) { use_asm = null; } }); AST_Node.DEFMETHOD("_print", AST_Node.prototype.print); AST_Node.DEFMETHOD("print_to_string", function(options){ var s = OutputStream(options); this.print(s); return s.get(); }); /* -----[ PARENTHESES ]----- */ function PARENS(nodetype, func) { if (Array.isArray(nodetype)) { nodetype.forEach(function(nodetype){ PARENS(nodetype, func); }); } else { nodetype.DEFMETHOD("needs_parens", func); } } PARENS(AST_Node, return_false); // a function expression needs parens around it when it's provably // the first token to appear in a statement. PARENS(AST_Function, function(output){ if (!output.has_parens() && first_in_statement(output)) { return true; } if (output.option('webkit')) { var p = output.parent(); if (p instanceof AST_PropAccess && p.expression === this) { return true; } } if (output.option('wrap_iife')) { var p = output.parent(); return p instanceof AST_Call && p.expression === this; } return false; }); // same goes for an object literal, because otherwise it would be // interpreted as a block of code. PARENS(AST_Object, function(output){ return !output.has_parens() && first_in_statement(output); }); PARENS(AST_Unary, function(output){ var p = output.parent(); return p instanceof AST_PropAccess && p.expression === this || p instanceof AST_Call && p.expression === this; }); PARENS(AST_Sequence, function(output){ var p = output.parent(); return p instanceof AST_Call // (foo, bar)() or foo(1, (2, 3), 4) || p instanceof AST_Unary // !(foo, bar, baz) || p instanceof AST_Binary // 1 + (2, 3) + 4 ==> 8 || p instanceof AST_VarDef // var a = (1, 2), b = a + a; ==> b == 4 || p instanceof AST_PropAccess // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2 || p instanceof AST_Array // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ] || p instanceof AST_ObjectProperty // { foo: (1, 2) }.foo ==> 2 || p instanceof AST_Conditional /* (false, true) ? (a = 10, b = 20) : (c = 30) * ==> 20 (side effect, set a := 10 and b := 20) */ ; }); PARENS(AST_Binary, function(output){ var p = output.parent(); // (foo && bar)() if (p instanceof AST_Call && p.expression === this) return true; // typeof (foo && bar) if (p instanceof AST_Unary) return true; // (foo && bar)["prop"], (foo && bar).prop if (p instanceof AST_PropAccess && p.expression === this) return true; // this deals with precedence: 3 * (2 + 1) if (p instanceof AST_Binary) { var po = p.operator, pp = PRECEDENCE[po]; var so = this.operator, sp = PRECEDENCE[so]; if (pp > sp || (pp == sp && this === p.right)) { return true; } } }); PARENS(AST_PropAccess, function(output){ var p = output.parent(); if (p instanceof AST_New && p.expression === this) { // i.e. new (foo.bar().baz) // // if there's one call into this subtree, then we need // parens around it too, otherwise the call will be // interpreted as passing the arguments to the upper New // expression. var parens = false; this.walk(new TreeWalker(function(node) { if (parens || node instanceof AST_Scope) return true; if (node instanceof AST_Call) { parens = true; return true; } })); return parens; } }); PARENS(AST_Call, function(output){ var p = output.parent(), p1; if (p instanceof AST_New && p.expression === this) return true; // workaround for Safari bug. // https://bugs.webkit.org/show_bug.cgi?id=123506 return this.expression instanceof AST_Function && p instanceof AST_PropAccess && p.expression === this && (p1 = output.parent(1)) instanceof AST_Assign && p1.left === p; }); PARENS(AST_New, function(output){ var p = output.parent(); if (!need_constructor_parens(this, output) && (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]() || p instanceof AST_Call && p.expression === this)) // (new foo)(bar) return true; }); PARENS(AST_Number, function(output){ var p = output.parent(); if (p instanceof AST_PropAccess && p.expression === this) { var value = this.getValue(); if (value < 0 || /^0/.test(make_num(value))) { return true; } } }); PARENS([ AST_Assign, AST_Conditional ], function(output){ var p = output.parent(); // !(a = false) → true if (p instanceof AST_Unary) return true; // 1 + (a = 2) + 3 → 6, side effect setting a = 2 if (p instanceof AST_Binary && !(p instanceof AST_Assign)) return true; // (a = func)() —or— new (a = Object)() if (p instanceof AST_Call && p.expression === this) return true; // (a = foo) ? bar : baz if (p instanceof AST_Conditional && p.condition === this) return true; // (a = foo)["prop"] —or— (a = foo).prop if (p instanceof AST_PropAccess && p.expression === this) return true; }); /* -----[ PRINTERS ]----- */ DEFPRINT(AST_Directive, function(self, output){ output.print_string(self.value, self.quote); output.semicolon(); }); DEFPRINT(AST_Debugger, function(self, output){ output.print("debugger"); output.semicolon(); }); /* -----[ statements ]----- */ function display_body(body, is_toplevel, output, allow_directives) { var last = body.length - 1; in_directive = allow_directives; body.forEach(function(stmt, i){ if (in_directive === true && !(stmt instanceof AST_Directive || stmt instanceof AST_EmptyStatement || (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String) )) { in_directive = false; } if (!(stmt instanceof AST_EmptyStatement)) { output.indent(); stmt.print(output); if (!(i == last && is_toplevel)) { output.newline(); if (is_toplevel) output.newline(); } } if (in_directive === true && stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String ) { in_directive = false; } }); in_directive = false; } AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output){ force_statement(this.body, output); }); DEFPRINT(AST_Statement, function(self, output){ self.body.print(output); output.semicolon(); }); DEFPRINT(AST_Toplevel, function(self, output){ display_body(self.body, true, output, true); output.print(""); }); DEFPRINT(AST_LabeledStatement, function(self, output){ self.label.print(output); output.colon(); self.body.print(output); }); DEFPRINT(AST_SimpleStatement, function(self, output){ self.body.print(output); output.semicolon(); }); function print_braced_empty(self, output) { output.print("{"); output.with_indent(output.next_indent(), function() { output.append_comments(self, true); }); output.print("}"); } function print_braced(self, output, allow_directives) { if (self.body.length > 0) { output.with_block(function() { display_body(self.body, false, output, allow_directives); }); } else print_braced_empty(self, output); } DEFPRINT(AST_BlockStatement, function(self, output){ print_braced(self, output); }); DEFPRINT(AST_EmptyStatement, function(self, output){ output.semicolon(); }); DEFPRINT(AST_Do, function(self, output){ output.print("do"); output.space(); make_block(self.body, output); output.space(); output.print("while"); output.space(); output.with_parens(function(){ self.condition.print(output); }); output.semicolon(); }); DEFPRINT(AST_While, function(self, output){ output.print("while"); output.space(); output.with_parens(function(){ self.condition.print(output); }); output.space(); self._do_print_body(output); }); DEFPRINT(AST_For, function(self, output){ output.print("for"); output.space(); output.with_parens(function(){ if (self.init) { if (self.init instanceof AST_Definitions) { self.init.print(output); } else { parenthesize_for_noin(self.init, output, true); } output.print(";"); output.space(); } else { output.print(";"); } if (self.condition) { self.condition.print(output); output.print(";"); output.space(); } else { output.print(";"); } if (self.step) { self.step.print(output); } }); output.space(); self._do_print_body(output); }); DEFPRINT(AST_ForIn, function(self, output){ output.print("for"); output.space(); output.with_parens(function(){ self.init.print(output); output.space(); output.print("in"); output.space(); self.object.print(output); }); output.space(); self._do_print_body(output); }); DEFPRINT(AST_With, function(self, output){ output.print("with"); output.space(); output.with_parens(function(){ self.expression.print(output); }); output.space(); self._do_print_body(output); }); /* -----[ functions ]----- */ AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword){ var self = this; if (!nokeyword) { output.print("function"); } if (self.name) { output.space(); self.name.print(output); } output.with_parens(function(){ self.argnames.forEach(function(arg, i){ if (i) output.comma(); arg.print(output); }); }); output.space(); print_braced(self, output, true); }); DEFPRINT(AST_Lambda, function(self, output){ self._do_print(output); }); /* -----[ exits ]----- */ AST_Exit.DEFMETHOD("_do_print", function(output, kind){ output.print(kind); if (this.value) { output.space(); this.value.print(output); } output.semicolon(); }); DEFPRINT(AST_Return, function(self, output){ self._do_print(output, "return"); }); DEFPRINT(AST_Throw, function(self, output){ self._do_print(output, "throw"); }); /* -----[ loop control ]----- */ AST_LoopControl.DEFMETHOD("_do_print", function(output, kind){ output.print(kind); if (this.label) { output.space(); this.label.print(output); } output.semicolon(); }); DEFPRINT(AST_Break, function(self, output){ self._do_print(output, "break"); }); DEFPRINT(AST_Continue, function(self, output){ self._do_print(output, "continue"); }); /* -----[ if ]----- */ function make_then(self, output) { var b = self.body; if (output.option("braces") || output.option("ie8") && b instanceof AST_Do) return make_block(b, output); // The squeezer replaces "block"-s that contain only a single // statement with the statement itself; technically, the AST // is correct, but this can create problems when we output an // IF having an ELSE clause where the THEN clause ends in an // IF *without* an ELSE block (then the outer ELSE would refer // to the inner IF). This function checks for this case and // adds the block braces if needed. if (!b) return output.force_semicolon(); while (true) { if (b instanceof AST_If) { if (!b.alternative) { make_block(self.body, output); return; } b = b.alternative; } else if (b instanceof AST_StatementWithBody) { b = b.body; } else break; } force_statement(self.body, output); } DEFPRINT(AST_If, function(self, output){ output.print("if"); output.space(); output.with_parens(function(){ self.condition.print(output); }); output.space(); if (self.alternative) { make_then(self, output); output.space(); output.print("else"); output.space(); if (self.alternative instanceof AST_If) self.alternative.print(output); else force_statement(self.alternative, output); } else { self._do_print_body(output); } }); /* -----[ switch ]----- */ DEFPRINT(AST_Switch, function(self, output){ output.print("switch"); output.space(); output.with_parens(function(){ self.expression.print(output); }); output.space(); var last = self.body.length - 1; if (last < 0) print_braced_empty(self, output); else output.with_block(function(){ self.body.forEach(function(branch, i){ output.indent(true); branch.print(output); if (i < last && branch.body.length > 0) output.newline(); }); }); }); AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output){ output.newline(); this.body.forEach(function(stmt){ output.indent(); stmt.print(output); output.newline(); }); }); DEFPRINT(AST_Default, function(self, output){ output.print("default:"); self._do_print_body(output); }); DEFPRINT(AST_Case, function(self, output){ output.print("case"); output.space(); self.expression.print(output); output.print(":"); self._do_print_body(output); }); /* -----[ exceptions ]----- */ DEFPRINT(AST_Try, function(self, output){ output.print("try"); output.space(); print_braced(self, output); if (self.bcatch) { output.space(); self.bcatch.print(output); } if (self.bfinally) { output.space(); self.bfinally.print(output); } }); DEFPRINT(AST_Catch, function(self, output){ output.print("catch"); output.space(); output.with_parens(function(){ self.argname.print(output); }); output.space(); print_braced(self, output); }); DEFPRINT(AST_Finally, function(self, output){ output.print("finally"); output.space(); print_braced(self, output); }); /* -----[ var/const ]----- */ AST_Definitions.DEFMETHOD("_do_print", function(output, kind){ output.print(kind); output.space(); this.definitions.forEach(function(def, i){ if (i) output.comma(); def.print(output); }); var p = output.parent(); var in_for = p instanceof AST_For || p instanceof AST_ForIn; var avoid_semicolon = in_for && p.init === this; if (!avoid_semicolon) output.semicolon(); }); DEFPRINT(AST_Var, function(self, output){ self._do_print(output, "var"); }); function parenthesize_for_noin(node, output, noin) { var parens = false; // need to take some precautions here: // https://github.com/mishoo/UglifyJS2/issues/60 if (noin) node.walk(new TreeWalker(function(node) { if (parens || node instanceof AST_Scope) return true; if (node instanceof AST_Binary && node.operator == "in") { parens = true; return true; } })); node.print(output, parens); } DEFPRINT(AST_VarDef, function(self, output){ self.name.print(output); if (self.value) { output.space(); output.print("="); output.space(); var p = output.parent(1); var noin = p instanceof AST_For || p instanceof AST_ForIn; parenthesize_for_noin(self.value, output, noin); } }); /* -----[ other expressions ]----- */ DEFPRINT(AST_Call, function(self, output){ self.expression.print(output); if (self instanceof AST_New && !need_constructor_parens(self, output)) return; if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) { output.add_mapping(self.start); } output.with_parens(function(){ self.args.forEach(function(expr, i){ if (i) output.comma(); expr.print(output); }); }); }); DEFPRINT(AST_New, function(self, output){ output.print("new"); output.space(); AST_Call.prototype._codegen(self, output); }); AST_Sequence.DEFMETHOD("_do_print", function(output){ this.expressions.forEach(function(node, index) { if (index > 0) { output.comma(); if (output.should_break()) { output.newline(); output.indent(); } } node.print(output); }); }); DEFPRINT(AST_Sequence, function(self, output){ self._do_print(output); // var p = output.parent(); // if (p instanceof AST_Statement) { // output.with_indent(output.next_indent(), function(){ // self._do_print(output); // }); // } else { // self._do_print(output); // } }); DEFPRINT(AST_Dot, function(self, output){ var expr = self.expression; expr.print(output); var prop = self.property; if (output.option("ie8") && RESERVED_WORDS[prop]) { output.print("["); output.add_mapping(self.end); output.print_string(prop); output.print("]"); } else { if (expr instanceof AST_Number && expr.getValue() >= 0) { if (!/[xa-f.)]/i.test(output.last())) { output.print("."); } } output.print("."); // the name after dot would be mapped about here. output.add_mapping(self.end); output.print_name(prop); } }); DEFPRINT(AST_Sub, function(self, output){ self.expression.print(output); output.print("["); self.property.print(output); output.print("]"); }); DEFPRINT(AST_UnaryPrefix, function(self, output){ var op = self.operator; output.print(op); if (/^[a-z]/i.test(op) || (/[+-]$/.test(op) && self.expression instanceof AST_UnaryPrefix && /^[+-]/.test(self.expression.operator))) { output.space(); } self.expression.print(output); }); DEFPRINT(AST_UnaryPostfix, function(self, output){ self.expression.print(output); output.print(self.operator); }); DEFPRINT(AST_Binary, function(self, output){ var op = self.operator; self.left.print(output); if (op[0] == ">" /* ">>" ">>>" ">" ">=" */ && self.left instanceof AST_UnaryPostfix && self.left.operator == "--") { // space is mandatory to avoid outputting --> output.print(" "); } else { // the space is optional depending on "beautify" output.space(); } output.print(op); if ((op == "<" || op == "<<") && self.right instanceof AST_UnaryPrefix && self.right.operator == "!" && self.right.expression instanceof AST_UnaryPrefix && self.right.expression.operator == "--") { // space is mandatory to avoid outputting